Power supply recovery method of active distribution network considering optimal distribution of closed-loop power flow

Active distribution network has flexible adjustment ability as well as fast and reliable operation ability. But the existence of soft open point(SOP), distributed generator and other equipments makes the power supply recovery model complex. It is necessary to study the fast decision-making method of power supply recovery after failure. A fast decision-making method for active distribution network load recovery scheme considering optimal distribution of closed power flow is proposed. The closed operation state of all the tie switches in the distribution network after fault removal is simulated, and the optimal power flow is solved based on the second-order cone programming to exit the lines with low voltage and small operating capacity, in order to form a benign network topology with SOP in the distribution network conducive to power supply recovery. A load recovery model based on load power factor and graded load weight is established. A load power supply recovery scheme is formulated to ensure that the off-power load can get the maximum recovery level strictly according to the priority. The simulative results of IEEE 33-bus distribution system and IEEE 69-bus distribution system show that the proposed method can be both accurate and fast. © 2024 Electric Power Automation Equipment Press. All rights reserved.